Each of the fallen soldiers – Henry Johnson, Paul Rider, Brent Hall an

Each of the fallen soldiers – Henry Johnson, Paul Rider, Brent Hall and Bob McCay - were hard workers, very different from the soldiers that remained to guard the hospital.

A. Each of the fallen soldiers – Henry Johnson, Paul Rider, Brent Hall and Bob McCay - were hard workers (SV error, it should be was)
B. Henry Johnson, Paul Rider, Brent Hall and Bob McCay - each of them fallen soldiers – were hard workers (wrong comparison of these 4 soldiers soldiers guarding at hospital; fallen soldeiers should be compared to guarding soldiers )
C. The fallen soldiers – Henry Johnson, Paul Rider, Brent Hall and Bob McCay - were all hard workers ( right comparison and SV agreement)
D. Hard workers - Henry Johnson, Paul Rider, Brent Hall and Bob McCay - each a fallen soldier ( wrong comparison)
E. Hard workers - Henry Johnson, Paul Rider, Brent Hall and Bob McCay - every one a fallen soldier (wrong comparison)

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Can anybody tell how the rest of the sentence i.e. (very different from the soldiers that remained to guard the hospital) is getting connected to the previous statement in C?
I am not getting this.

A. Each of the fallen soldiers (Subject) – Henry Johnson, Paul Rider, Brent Hall and Bob McCay - were hard workers --> SIngular subject with plural verb.
B. Henry Johnson, Paul Rider, Brent Hall and Bob McCay - each of them fallen soldiers – were hard workers --> The text between "- -" usually denotes examples and is not essential to the sentence. Hence in this option, meaning will changed if we discard the text "each of them fallen soldiers". Apart from that "each of them fallen soldiers" itself is wrong grammatically
C. The fallen soldiers (Subject) – Henry Johnson, Paul Rider, Brent Hall and Bob McCay - were all hard workers --> Corrects the error in A.
D. Hard workers - Henry Johnson, Paul Rider, Brent Hall and Bob McCay - each a fallen soldier --> Meaning error
E. Hard workers - Henry Johnson, Paul Rider, Brent Hall and Bob McCay - every one a fallen soldier --> Meaning error

Hence Option C

It doesn't need to be connected to the rest of the sentence the way that a clause would. Take a look at this post.

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